<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Get number of rows affected by a query</title>
 </head>
 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.ifx-affected-rows" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ifx_affected_rows</h1>
  <p class="verinfo">(PHP 4, PHP 5 &lt; 5.2.1)</p><p class="refpurpose"><span class="refname">ifx_affected_rows</span> &mdash; <span class="dc-title">Get number of rows affected by a query</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.ifx-affected-rows-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>ifx_affected_rows</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result_id</code></span>
   ) : <span class="type">int</span></div>

  <p class="para rdfs-comment">
   Returns the number of rows affected by a query associated with
   <code class="parameter">result_id</code>.
  </p>
  <p class="para">
   For inserts, updates and deletes the number is the real number
   (sqlerrd[2]) of affected rows. For selects it is an estimate
   (sqlerrd[0]). Don&#039;t rely on it. The database server can never
   return the actual number of rows that will be returned by a
   SELECT because it has not even begun fetching them at this stage
   (just after the &quot;PREPARE&quot; when the optimizer has determined the
   query plan).
  </p>
  <p class="para">
   Useful after <span class="function"><a href="ifx_prepare.html" class="function">ifx_prepare()</a></span> to limit queries to
   reasonable result sets.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.ifx-affected-rows-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">result_id</code></dt>

     <dd>

      <p class="para">
       A valid result id returned by <span class="function"><a href="ifx_query.html" class="function">ifx_query()</a></span> or
       <span class="function"><a href="ifx_prepare.html" class="function">ifx_prepare()</a></span>.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ifx-affected-rows-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the number of rows as an integer.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.ifx-affected-rows-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-1282">
    <p><strong>Example #1 Informix affected rows</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$rid&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ifx_prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"select&nbsp;*&nbsp;from&nbsp;emp<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;where&nbsp;name&nbsp;like&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$name</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$connid</span><span style="color: #007700">);<br />if&nbsp;(!&nbsp;</span><span style="color: #0000BB">$rid</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;...&nbsp;error&nbsp;...&nbsp;*/<br /></span><span style="color: #007700">}<br /></span><span style="color: #0000BB">$rowcount&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ifx_affected_rows</span><span style="color: #007700">(</span><span style="color: #0000BB">$rid</span><span style="color: #007700">);<br />if&nbsp;(</span><span style="color: #0000BB">$rowcount&nbsp;</span><span style="color: #007700">&gt;&nbsp;</span><span style="color: #0000BB">1000</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf&nbsp;</span><span style="color: #007700">(</span><span style="color: #DD0000">"Too&nbsp;many&nbsp;rows&nbsp;in&nbsp;result&nbsp;set&nbsp;(%d)\n&lt;br&nbsp;/&gt;"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rowcount</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;die&nbsp;(</span><span style="color: #DD0000">"Please&nbsp;restrict&nbsp;your&nbsp;query&lt;br&nbsp;/&gt;\n"</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ifx-affected-rows-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="ifx_num_rows.html" class="function" rel="rdfs-seeAlso">ifx_num_rows()</a> - Count the rows already fetched from a query</span></li>
   </ul>
  </p>
 </div>


</div></div></div></body></html>